<template>
  <div class="wrapper">
    <!-- header部分 -->
    <header>
    
      <p>商家列表</p>
    </header>
    <!-- 商家列表部分 -->
    <ul class="business">
      <li v-for="item in businessArr" :key="item.businessId" @click="toBusinessInfo(item.businessId)">
        <div class="business-img">
          <img :src="item.businessImg" />
          <div class="business-img-quantity" v-show="item.quantity > 0">
            {{ item.quantity }}
          </div>
        </div>
        <div class="business-info">
          <h3>{{ item.businessName }}</h3>
          <p>&#165;{{ item.starPrice }}起送 | &#165;{{ item.deliveryPrice }}配送</p>
          <p>{{ item.businessExplain }}</p>
        </div>
      </li>
    </ul>
    <!-- 底部菜单部分 -->
    <Footer></Footer>
  </div>
</template>

<script>
import Footer from '../components/Footer.vue';
import backButton from '../components/backButton.vue';

export default {
  name: 'BusinessList',
  data() {
    return {
      orderTypeId: this.$route.query.orderTypeId,
      businessArr: this.$route.query.businessArr,
      user: {}
    };
  },
  created() {
    this.user = this.$getSessionStorage('user');

    // 根据 orderTypeId 查询商家信息
    this.fetchBusinessList();
  },
  components: {
    Footer,backButton
  },
  methods: {
    fetchBusinessList() {
      if(this.orderTypeId==null){
        console.log(this.businessArr);
      }
      else{
        this.$axios
          .get(`/businesses/orderType/${this.orderTypeId}`)
          .then((response) => {
            this.businessArr = response.data.data;
            // 判断是否登录
            if (this.user != null) {
              this.listCart();
            }
          })
          .catch((error) => {
            console.error(error);
          });
      }
      
    },
    listCart() {
      this.$axios
          .get(`/carts?userId=${this.user.userId}`)
          .then((response) => {
            let cartArr = response.data.data;
            // 遍历所有食品列表
            for (let businessItem of this.businessArr) {
              businessItem.quantity = 0;
              for (let cartItem of cartArr) {
                if (cartItem.businessId === businessItem.businessId) {
                  businessItem.quantity += cartItem.quantity;
                }
              }
            }
            this.businessArr.sort();
          })
          .catch((error) => {
            console.error(error);
          });
    },
    toBusinessInfo(businessId) {
      this.$router.push({
        path: '/businessInfo',
        query: {
          businessId: businessId
        }
      });
    }
  }
};
</script>
<style scoped>
	/****************** 总容器 ******************/
	.wrapper {
		width: 100%;
		height: 100%;
	}

	/****************** header部分 ******************/
	.wrapper header {
		width: 100%;
		height: 12vw;
		background-color: #0097FF;
		color: #fff;
		font-size: 4.8vw;
		position: fixed;
		left: 0;
		top: 0;
		z-index: 1000;
		display: flex;
		justify-content: center;
		align-items: center;
	}

	/****************** 商家列表部分 ******************/
	.wrapper .business {
		width: 100%;
		margin-top: 12vw;
		padding-bottom: 14vw;
	}

	.wrapper .business li {
		width: 100%;
		box-sizing: border-box;
		padding: 2.5vw;
		border-bottom: solid 1px #DDD;
		user-select: none;
		cursor: pointer;
		display: flex;
		align-items: center;
	}

	.wrapper .business li .business-img {
		/*这里设置为相当定位，成为business-img-quantity元素的父元素*/
		position: relative;
	}

	.wrapper .business li .business-img img {
		width: 20vw;
		height: 20vw;
    border-radius: 10px;
	}

	.wrapper .business li .business-img .business-img-quantity {
		width: 5vw;
		height: 5vw;
		background-color: red;
		color: #fff;
		font-size: 3.6vw;
		border-radius: 2.5vw;
		display: flex;
		justify-content: center;
		align-items: center;
		/*设置成绝对定位，不占文档流空间*/
		position: absolute;
		right: -1.5vw;
		top: -1.5vw;
	}

	.wrapper .business li .business-info {
		margin-left: 3vw;
	}

	.wrapper .business li .business-info h3 {
		font-size: 3.8vw;
		color: #555;
	}

	.wrapper .business li .business-info p {
		font-size: 3vw;
		color: #888;
		margin-top: 2vw;
	}
</style>